automatic vent damper . The typical automatic vent damper is an electrically controlled flap that sits in the vent connector, just downstream (after) of the draft hood (draft diverter). It's just a fancy sock to stop air leaking up the chimney when the furnace is off. There are also heat activated vent dampers, but these are less common.
The immune system is a system of many biological structures and processes within an organism that protects against disease. To function properly, an immune system must detect a wide variety of agents, known as pathogens, from viruses to parasitic worms, and distinguish them from the organism's own healthy tissue.he main response of the immune system to tumors is to destroy the abnormal cells using killer T cells, sometimes with the assistance of helper T cells. Tumor antigens are presented on MHC class I molecules in a similar way to viral antigens. This allows killer T cells to recognize the tumor cell as abnormal.
The endocrine system is a unique and essential part of normal body function. Where the nervous system handles functions that happen quickly, like breathing and body movement, the endocrine system handles body functions that happen much slower, such as the growth of cells, organs, and metabolism.Endocrine system keeps the body's hormone and secretion levels in balance.Since there is a whole series of organs and glands that must work in tandem to maintain healthy hormone and secretion levels, when one of them doesn't function the way it's supposed to function, it puts a heavy strain on the rest of the body.he endocrine system is a unique and essential part of normal body function. Where the nervous system handles functions that happen quickly, like breathing and body movement, the endocrine system handles body functions that happen much slower, such as the growth of cells, organs, and metabolism.